MBMG-133392
Montana Bureau of Mines and Geology
Located in Beaverhead County, Montana, this groundwater monitoring location is associated with a water well in the Northern Rocky Mountains Intermontane Basins aquifer systems.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.3-485.0 ft | 4.0 in diameter pvc casing | |
| -2.3-421.0 ft | 6.0 in diameter steel casing | |
| 475.0-485.0 ft | 4.0 in diameter screen-continuous-pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-20.0 ft | unknown | SANDY SILT/CLAY |
| 20.0-45.0 ft | unknown | GRAVELLY SAND W/MINOR SILT |
| 45.0-50.0 ft | unknown | SANDY (30%) SILT/CLAY |
| 50.0-70.0 ft | unknown | GRAVELLY F-M-C- SAND W/MINOR CLAY |
| 70.0-110.0 ft | unknown | SANDY GRAVEL W/MINOR SILT/CLAY-<5 GPM UNTIL 105 FT THEN >100 GPM |
| 110.0-120.0 ft | unknown | GRAVELLY SAND W/MUCH SILT/CLAY |
| 120.0-173.0 ft | unknown | 25-40% GRAVELLY SAND W/MINOR SILT- 100 GPM |
| 173.0-175.0 ft | unknown | LARGE COBBLES |
| 175.0-205.0 ft | unknown | COBBLES AND GRAVELLY SAND- MINOR SILT |
| 205.0-220.0 ft | unknown | SANDY SILT/CLAY (65% W/MINOR GRAVEL) |
| 220.0-250.0 ft | unknown | 15% GRAVELLY SAND W/ABUNDANT SILT |
| 250.0-260.0 ft | unknown | GRAVEL AND SAND W/15% SILT/CLAY |
| 260.0-280.0 ft | unknown | SANDY SILT/CLAY |
| 280.0-290.0 ft | unknown | 20% GRAVELLY SAND W/ABUNDANT SILT (45%) |
| 290.0-320.0 ft | unknown | 25% GRAVELLY SAND W/MINOR SILT- 40 GPM |
| 320.0-340.0 ft | unknown | SILT/CLAY AND GRAVEL W/50% SAND |
| 340.0-390.0 ft | unknown | SAND AND SILT/CLAY W/MINOR GRAVEL |
| 390.0-420.0 ft | unknown | GRAVELLY SAND W/SOME SILT/CLAY-40 GPM FROM 250-320 LITTLE WATER FROM 300-420. |
| 420.0-470.0 ft | unknown | POORLY CONSOLIDATED SILTSTONE & PIECES OF GREEN OR ORANGE HARD SILTSTONE- 5 GPM |
| 470.0-480.0 ft | unknown | SOFT SILTSTONE & 50% ROUNDED GRAY AND PURPLE VOLCANIC GRAVEL- WATER |
| 480.0-505.0 ft | unknown | SOFT- POORLY CONSOLIDATED SILTSTONE |
| 505.0-530.0 ft | unknown | SOFT SILTSTONE & 50% ROUNDED GRAY AND PURPLE VOLCANIC GRAVEL |
| 530.0-570.0 ft | unknown | SOFT BROWN SILTSTONE W/TRACES OF WHITE VOLCANIC SILT |
| 570.0-600.0 ft | unknown | SOFT BROWN SILTSTONE W/TRACES OF ORANGE SILTSTONE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-133392 Site Number 133392 Site Type WELL Lat/Long (NAD83) 45.1642, -112.6863 Well Depth 600 Feet Elevation (NGVD29) 5182.4 ft Latitude 45.16422134 Longitude -112.6862547 Local Aquifer Name 120SNGR, SAND AND GRAVEL (TERTIARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type CONFINED Water-Level Well Type Surveillance Water-Level Well Characteristics Background Water Quality Network MONTANA GWIC Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 12.98 11.02 8.30 1993-04-15 2026-04-01 170 33.0 12.73 0.0 Statistics Calculated 2026-05-16 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record Mar 12.98 12.73 12.15 11.83 10.77 9.52 9.08 27 27 Jun 12.95 12.48 12.01 11.36 10.03 9.30 8.62 26 26 Sep 12.51 12.32 11.77 11.22 9.81 8.83 8.38 26 26 Dec 12.75 12.46 11.95 11.35 10.39 9.25 8.77 23 23 Statistics Calculated 2026-05-16 -
Operated in cooperation with:
